linux-kernel - Re: ACPI regression in 2.6.25-rc6 (function keys stop working)

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Date:	Wed, 19 Mar 2008 00:29:03 +0100
From:	"Guillaume Chazarain" <guichaz@...il.com>
To:	"Alexey Starikovskiy" <astarikovskiy@...e.de>
Cc:	linux-acpi@...r.kernel.org, linux-kernel@...r.kernel.org,
	lenb@...nel.org, "Tim Elliott" <tle@...ymonkey.com>
Subject: Re: ACPI regression in 2.6.25-rc6 (function keys stop working)

Hi Alexey,

Thanks for your assistance. Here are the results of various tests:

=== vanilla:
           CPU0
  0:      14637   IO-APIC-edge      timer
  1:        213   IO-APIC-edge      i8042
  3:          2   IO-APIC-edge
  8:          1   IO-APIC-edge      rtc
  9:        318   IO-APIC-fasteoi   acpi
 12:       3534   IO-APIC-edge      i8042
 14:      12481   IO-APIC-edge      ata_piix
 15:          0   IO-APIC-edge      ata_piix
 16:      14609   IO-APIC-fasteoi   uhci_hcd:usb5, firewire_ohci,
radeon@pci:0000:01:00.0
 17:       5681   IO-APIC-fasteoi   yenta, ipw2200, Intel ICH6
 18:          0   IO-APIC-fasteoi   uhci_hcd:usb4, sdhc0:slot0, eth0
 19:          0   IO-APIC-fasteoi   uhci_hcd:usb3
 20:          0   IO-APIC-fasteoi   Intel ICH6 Modem
 23:          4   IO-APIC-fasteoi   ehci_hcd:usb1, uhci_hcd:usb2
NMI:          0   Non-maskable interrupts
LOC:      22742   Local timer interrupts
TRM:          0   Thermal event interrupts
SPU:          0   Spurious interrupts
ERR:          0
MIS:          0

ACPI keys don't work at all

=== 2c81ce4c9c3 reverted:

           CPU0
  0:      13379   IO-APIC-edge      timer
  1:        205   IO-APIC-edge      i8042
  3:          2   IO-APIC-edge
  8:          1   IO-APIC-edge      rtc
  9:       3599   IO-APIC-fasteoi   acpi
 12:       3654   IO-APIC-edge      i8042
 14:      13034   IO-APIC-edge      ata_piix
 15:          0   IO-APIC-edge      ata_piix
 16:      14073   IO-APIC-fasteoi   uhci_hcd:usb5, firewire_ohci,
radeon@pci:0000:01:00.0
 17:       7855   IO-APIC-fasteoi   yenta, ipw2200, Intel ICH6
 18:          0   IO-APIC-fasteoi   uhci_hcd:usb4, eth0, sdhc0:slot0
 19:          0   IO-APIC-fasteoi   uhci_hcd:usb3
 20:          0   IO-APIC-fasteoi   Intel ICH6 Modem
 23:          4   IO-APIC-fasteoi   ehci_hcd:usb1, uhci_hcd:usb2
NMI:          0   Non-maskable interrupts
LOC:      22153   Local timer interrupts
TRM:          0   Thermal event interrupts
SPU:          0   Spurious interrupts
ERR:          0
MIS:          0

ACPI keys work fine.

=== 2c81ce4c9c3 reverted + call_psw_on_capable_devices.patch

           CPU0
  0:      12372   IO-APIC-edge      timer
  1:        195   IO-APIC-edge      i8042
  3:          2   IO-APIC-edge
  8:          1   IO-APIC-edge      rtc
  9:       7976   IO-APIC-fasteoi   acpi
 12:       1824   IO-APIC-edge      i8042
 14:      12168   IO-APIC-edge      ata_piix
 15:          0   IO-APIC-edge      ata_piix
 16:      11829   IO-APIC-fasteoi   uhci_hcd:usb5, firewire_ohci,
radeon@pci:0000:01:00.0
 17:       4803   IO-APIC-fasteoi   yenta, ipw2200, Intel ICH6
 18:          0   IO-APIC-fasteoi   uhci_hcd:usb4, sdhc0:slot0, eth0
 19:          0   IO-APIC-fasteoi   uhci_hcd:usb3
 20:          0   IO-APIC-fasteoi   Intel ICH6 Modem
 23:         58   IO-APIC-fasteoi   ehci_hcd:usb1, uhci_hcd:usb2
NMI:          0   Non-maskable interrupts
LOC:      21962   Local timer interrupts
TRM:          0   Thermal event interrupts
SPU:          0   Spurious interrupts
ERR:          0
MIS:          0

ACPI keys work fine.

=== dont_disable_ec_gpe_completely_at_storm.patch

           CPU0
  0:      19657   IO-APIC-edge      timer
  1:        434   IO-APIC-edge      i8042
  3:          2   IO-APIC-edge
  8:          1   IO-APIC-edge      rtc
  9:       3310   IO-APIC-fasteoi   acpi
 12:       7224   IO-APIC-edge      i8042
 14:      13055   IO-APIC-edge      ata_piix
 15:          0   IO-APIC-edge      ata_piix
 16:      18637   IO-APIC-fasteoi   uhci_hcd:usb5, firewire_ohci,
radeon@pci:0000:01:00.0
 17:       7281   IO-APIC-fasteoi   yenta, ipw2200, Intel ICH6
 18:          0   IO-APIC-fasteoi   uhci_hcd:usb4, eth0, sdhc0:slot0
 19:          0   IO-APIC-fasteoi   uhci_hcd:usb3
 20:          0   IO-APIC-fasteoi   Intel ICH6 Modem
 23:          4   IO-APIC-fasteoi   ehci_hcd:usb1, uhci_hcd:usb2
NMI:          0   Non-maskable interrupts
LOC:      26645   Local timer interrupts
TRM:          0   Thermal event interrupts
SPU:          0   Spurious interrupts
ERR:          0
MIS:          0

dmesg contains:
ACPI: EC: GPE storm detected, throttle EC GPE
ACPI: EC: missing write data confirmation, don't expect it any longer.

ACPI keys quite work but are very laggy (in the order of seconds).


Conclusion: I never experienced acpi interrupts flood in any case, in
vanilla the interrupt count is much lower but then there are no
interrupts even when I press acpi keys.
dont_disable_ec_gpe_completely_at_storm.patch does not correctly fix
the problem for me. When 2c81ce4c9c3 is reverted,
call_psw_on_capable_devices.patch makes no difference as it still
works well.

Thanks.

-- 
Guillaume
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